C# 抽象工厂模式

小鱼儿 2022-03-02 12:46 171阅读 0赞

using System;
     
    namespace AbstractFactory
    { 
        class Program
        { 
            static void Main(string[] args)
            { 
                //抽象工厂模式，主要用来生产具备特定关系的产品
                //增加品牌容易，扩展工厂即可；增加品种难，修改涉及太多
                IFactory[] gc = {  new HPFactory(), new DellFactory() };
                foreach (IFactory c in gc)
                { 
                    Console.WriteLine(">>>>{0}的键鼠套装：", c);
                    c.CreateKeyboard().SayHi();
                    c.CreateMouse().SayHi();
                    Console.WriteLine();
                }
            }
        }
     
        //鼠标接口：鼠标必须具备的功能
        public interface IMouse
        { 
            void SayHi();
        }
        //键盘接口：键盘必须具备的功能
        public interface IKeyboard
        { 
            void SayHi();
        }
        //工厂接口：实现接口的为合格工厂
        public interface IFactory
        { 
            IMouse CreateMouse();
            IKeyboard CreateKeyboard();
        }
     
        public class HPFactory : IFactory
        { 
            //隐藏的鼠标实现，避免使用者直接创建
            //这里应该是一个复杂对象，但使用者无须了解且不能随意创建
            private class HPMouse : IMouse
            { 
                public void SayHi()
                { 
                    Console.WriteLine("Hi! {0}", this);
                }
            }
            //成套产品，产品之间具有关联性
            private class HPKeyboard : IKeyboard
            { 
                public void SayHi()
                { 
                    Console.WriteLine("Hi! {0}", this);
                }
            }
            public IMouse CreateMouse()
            { 
                return new HPMouse();
            }
            public IKeyboard CreateKeyboard()
            { 
                return new HPKeyboard();
            }
        }
     
        public class DellFactory : IFactory
        { 
            private class DellMouse : IMouse
            { 
                public void SayHi()
                { 
                    Console.WriteLine("Hi! {0}", this);
                }
            }
            private class DellKeyboard : IKeyboard
            { 
                public void SayHi()
                { 
                    Console.WriteLine("Hi! {0}", this);
                }
            }
            public IMouse CreateMouse()
            { 
                return new DellMouse();
            }
            public IKeyboard CreateKeyboard()
            { 
                return new DellKeyboard();
            }
        }
    }